Using transposer

Transposer is free software (GPL3),
which transposes the chords from a song in a text file into the chords
which the user wants.

There are two text panes, the one on the left is for the original song,
and one
on the right is for the transposed song. You select the song key, and
the desired key to transpose it into from spin boxes, then you simply
press the button to transpose the song.
Songs can be keyed in to the song panel, or you can find a song file
(if it is a text only file) and open it right up in the song file edit
panel.

An example song is basically what you would expect (song lines and
chord lines):